help me please. i’m supposed to use trigonometry. i would appreciate it if a numerical answer was given

Find the value of x for which the lines are parallel.

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?